DOCUMENT DATA STRUCTURE, DOCUMENT CONVERSION DEVICE, DOCUMENT RESTORATION DEVICE, DOCUMENT CONVERSION METHOD, DOCUMENT RESTORATION METHOD, DOCUMENT CONVERSION PROGRAM, DOCUMENT RESTORATION PROGRAM AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a document data structure obtaining a plurality of kinds of objects, or wherein a background is formed in a different plane and is integrated. SOLUTION: In this structure of document data DD, three planes PLN(1), PLN(2), PLN(3) according to an encoding method are extracted from one original document 100, and the three planes are integrated as one document. The structure of the document data DD has the three planes and a reference image FEF having information for selecting one of the three planes in each pixel as three-gradation value. COPYRIGHT: (C)2006,JPO&NCIPI